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Finding the Fourth Proportional to 165,718.80, 248,578.20 and 91,069.20

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Solution

The fourth proportional to 165,718.80, 248,578.20 and 91,069.20 is: 136,603.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,718.80 : 248,578.20 = 91,069.20 : x
  2. Step 2: Convert to fraction form
    165,718.80/248,578.20 = 91,069.20/x
  3. Step 3: Cross multiply
    165,718.80x = 248,578.20 × 91,069.20
  4. Step 4: Simplify right side
    165,718.80x = 22,637,817,811.44
  5. Step 5: Solve for x
    x = 22,637,817,811.44/165,718.80
  6. Step 6: Final answer
    x = 136,603.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.